<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			console.log(x);
			var x = 1;
			console.log(x);
			
			var x;
			console.log(x)
			x= 1;
			console.log(x);
		</script>
	</body>
</html>
